Active carbon electrode material as well as preparation method and application thereof

Abstract

The invention discloses an activated carbon electrode material and its preparation method and application. 1) Mixed solution preparation: prepare an activator solution, mix and stir with biochar obtained by direct deoxidation and liquefaction of biomass, and then dry the mixed solution to obtain a mixed solution. 2) Activation process: the obtained mixture is placed in a tubular resistance furnace and activated under nitrogen protection; 3) pickling process: the cooled activated biochar is washed with hydrochloric acid and deionized water to neutrality respectively, The product is vacuum-dried to obtain the required activated carbon material; 4) activated carbon electrode preparation: the prepared activated carbon sample is pulverized to 10-30 μm, according to the ratio of activated carbon: PTEF: acetylene carbon black = 7-9: 1: 1, and The solvents are mixed and then dried, pressed into thin slices of 80-150 μm, and then vacuum-dried to obtain the electrode material to be prepared. The prepared porous activated carbon material has a large specific surface area, a large specific capacitance, and good cycle stability, and has broad application prospects in the field of electrode materials for supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor electrode materials, and in particular relates to an activated carbon electrode material and its preparation method and application. Background technique [0002] With the rapid development of social economy and the increasing shortage of resources, the new energy storage element supercapacitor has been developed rapidly, which well makes up for the shortcomings of batteries and fuel cells, such as low power, poor resistance to high current charge and discharge, and low energy storage density of traditional capacitors. , The application in the fields of new energy vehicles, mobile communications and aerospace has attracted more and more people's attention. Therefore, research on electrochemical capacitors has become a hot spot in the research of new energy storage components, and electrode materials are the key factors that determine the performance of electrochemical capacit...

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Problems solved by technology

[0004] At present, this solid product is generally used directly as an adsorbent and soil improver. There is no modification of the solid product at home and abroad to make an activated carbon material that can be directly used to prepare supercapacitors, and there is no direct deoxidation of biomass to liquefy biochar. Related reports on preparation of supercapacitor electrode materials from raw materials